01-mediafrag-minutes.html
56.4 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html lang='en' xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
<meta name="generator" content=
"HTML Tidy for Linux (vers 6 November 2007), see www.w3.org" />
<title>Media Fragments Working Group Teleconference -- 01 Nov
2010</title>
<link type="text/css" rel="STYLESHEET" href=
"http://www.w3.org/StyleSheets/base.css" />
<link type="text/css" rel="STYLESHEET" href=
"http://www.w3.org/StyleSheets/public.css" />
<link type="text/css" rel="STYLESHEET" href=
"http://www.w3.org/2004/02/minutes-style.css" />
<meta content="Media Fragments Working Group Teleconference"
name="Title" />
<meta content="text/html; charset=utf-8" http-equiv=
"Content-Type" />
</head>
<body>
<p><a href="http://www.w3.org/"><img src=
"http://www.w3.org/Icons/w3c_home" alt="W3C" border="0" height=
"48" width="72" /></a></p>
<h1>- DRAFT -</h1>
<h1>Media Fragments Working Group Teleconference</h1>
<h2>01 Nov 2010</h2>
<p>See also: <a href=
"http://www.w3.org/2010/11/01-mediafrag-irc">IRC log</a></p>
<h2><a name="attendees" id="attendees">Attendees</a></h2>
<div class="intro">
<dl>
<dt>Present</dt>
<dd>Roseraie_1</dd>
<dt>Regrets</dt>
<dd>Erik</dd>
<dt>Chair</dt>
<dd>Raphael</dd>
<dt>Scribe</dt>
<dd>raphael</dd>
</dl>
</div>
<h2>Contents</h2>
<ul>
<li>
<a href="#agenda">Topics</a>
<ol>
<li><a href="#item01">1. Quick round of
introduction</a></li>
<li><a href="#item02">2. Topics to be discussed</a></li>
<li><a href="#item03">3. Track and Name dimensions</a></li>
<li><a href="#item04">4. Summary</a></li>
</ol>
</li>
<li><a href="#ActionSummary">Summary of Action Items</a></li>
</ul>
<hr />
<div class="meeting">
<p class='phone'></p>
<p class='phone'></p>
<p class='irc'><<cite>trackbot</cite>> Date: 01 November
2010</p>
<p class='phone'><cite>Presents:</cite> Davy, Jack, Raphael,
Silvia (irc), Phillip (irc), Yves</p>
<p class='irc'><<cite>scribe</cite>> Meeting: Media
Fragments F2F meeting @TPAC</p>
<h3 id="item01">1. Quick round of introduction</h3>
<p class='irc'><<cite>scribe</cite>> scribe: raphael</p>
<p class='irc'><<cite>scribe</cite>> scribenick:
raphael</p>
<p class='phone'>Many observers ...</p>
<p class='phone'>Fran�ois: w3c staff</p>
<p class='phone'>Ben (Nokia): MAWG member</p>
<p class='phone'><cite>Hidetaka:</cite> developer of Mobile
browser, interest in adaptation to small screen</p>
<p class='phone'>Nobu (NEC ac rep): media analysis (face
recognition), interest in standardising results of such
analysis</p>
<p class='phone'>Hiroyuki (Toshiba ac rep): metadata
standardisation</p>
<p class='phone'>Franck (Canon research France): I'm an "old"
observer of this group, interest in media fragments standard
for streaming media</p>
<p class='phone'>Pierre Antoine (LIRIS): Uni of Lyon, member of
MAWG</p>
<h3 id="item02">2. Topics to be discussed</h3>
<p class='phone'><a href=
"http://www.w3.org/2008/WebVideo/Fragments/wiki/SeventhF2FAgenda">
http://www.w3.org/2008/WebVideo/Fragments/wiki/SeventhF2FAgenda</a></p>
<p class='phone'><cite>Raphael:</cite> time dimension<br />
... Philip wonders if the hours should not be optional<br />
... arguing that most video clips are less than an hour
duration<br />
... in WebSRT, hours are optional<br />
... should we do the same?</p>
<p class='phone'><cite>Jack:</cite> -0, I'm slightly
against</p>
<p class='phone'><cite>Raphael:</cite> the production rules are
currently</p>
<p class='phone'>npt-sec = 1*DIGIT [ "." *DIGIT ] ; definitions
taken</p>
<p class='phone'>npt-hhmmss = npt-hh ":" npt-mm ":" npt-ss [
"." *DIGIT] ; from RFC 2326</p>
<p class='phone'>npt-hh = 1*DIGIT ; any positive number</p>
<p class='phone'>npt-mm = 2DIGIT ; 0-59</p>
<p class='phone'>npt-ss = 2DIGIT ; 0-59</p>
<p class='irc'><<cite>jackjansen</cite>> after some
discussion I am now +0, slightly in favor</p>
<p class='phone'><cite>Raphael:</cite> I do remember that
Silvia and Philip was also for making the hours optional<br />
... I suggest to edit the grammar this afternoon with Yves if
he does not disagree</p><a name="action01" id="action01"></a>
<p class='irc'><<cite>scribe</cite>>
<strong>ACTION:</strong> Yves to update the production rules of
the time dimension with the npt format for making the hours
optional [recorded in <a href=
"http://www.w3.org/2010/11/01-mediafrag-minutes.html#action01">http://www.w3.org/2010/11/01-mediafrag-minutes.html#action01</a>]</p>
<p class='irc'><<cite>trackbot</cite>> Created ACTION-191
- Update the production rules of the time dimension with the
npt format for making the hours optional [on Yves Lafon - due
2010-11-08].</p>
<p class='irc'><<cite>silvia</cite>> I like the
simplicity for the user of the more flexible format</p>
<p class='phone'><cite>Raphael:</cite> smpte format</p>
<p class='phone'><cite>Davy:</cite> the servers is always
answering with the same unit than the client</p>
<p class='phone'><cite>Jack:</cite> well, but if the UA sends a
fragment in smpte-30-drop, and the media has another encoding,
then should we do a conversion?<br />
... if the UA sends a npt format, it is clear what the server
has to do</p>
<p class='irc'><<cite>silvia</cite>> note that the UA can
convert what the user provides to the browser to a common
format that can go over the wire</p>
<p class='phone'><cite>Jack:</cite> but if the UA sends one of
the smpte definition, and the media happens to use a different
format for defining time, then we might have a problem</p>
<p class='phone'><cite>Davy:</cite> the problem is that the UA
might not understand the time format in which you are
converting to</p>
<p class='phone'><cite>Raphael:</cite> yes Silvia, but then we
always convert to npt?</p>
<p class='irc'><<cite>silvia</cite>> hmm.. right - might
be better to just hand it through</p>
<p class='phone'><cite>Jack:</cite> we could raise an error, if
the UA asks for smpte time codes but that smpte has not been
used in the media item</p>
<p class='phone'><cite>Davy:</cite> our current implementation
works with a double conversion<br />
... if the UA sends a smpte-30-drop media fragment and the
media item is encoded in smpte-25<br />
... then the servers will convert the smpte-30-drop into npt to
get a position and convert it back in smpte-30-drop</p>
<p class='phone'><cite>Jack:</cite> the frame precision will be
most used in the annotation area rather than the presentation
area<br />
... so we should not have the presentation (browsers) glasses
to look at this issue</p>
<p class='phone'><cite>Raphael:</cite> let's summarize the
discussion<br />
... smpte time codes are useful for a number of use cases, in
particular for annotation use cases<br />
... when generally a UA sends a media fragment request with a
time format which is different than the time format used in the
media item<br />
... then the server should fallback to answering in npt if it
has an understanding of the timeformat requested bu the
UA<br />
... if the server does not understand the time format requested
by the UA, the default fallback is to ignore the media fragment
and send the whole resource</p>
<p class='phone'><cite>Jack:</cite> ok, where this information
should be written ? is this normative ?<br />
... section 5 seems appropriate, I'm tempted to say it should
be normative</p>
<p class='phone'><cite>Raphael:</cite> we might have to change
the structure of section 5 to make it dimension
dependent</p><a name="action02" id="action02"></a>
<p class='irc'><<cite>scribe</cite>>
<strong>ACTION:</strong> Davy to update the specification to
state what the processing should do when media fragments
request (time dimension) does not match exactly how the media
item has been encoded [recorded in <a href=
"http://www.w3.org/2010/11/01-mediafrag-minutes.html#action02">http://www.w3.org/2010/11/01-mediafrag-minutes.html#action02</a>]</p>
<p class='irc'><<cite>trackbot</cite>> Created ACTION-192
- Update the specification to state what the processing should
do when media fragments request (time dimension) does not match
exactly how the media item has been encoded [on Davy Van
Deursen - due 2010-11-08].</p>
<p class='phone'><cite>Raphael:</cite> let's discuss the space
dimension</p>
<p class='phone'>ACTION-190?</p>
<p class='irc'><<cite>trackbot</cite>> ACTION-190 --
Raphaël Troncy to update our spec to talk about video intrinsic
width -- due 2010-10-27 -- OPEN</p>
<p class='irc'><<cite>trackbot</cite>> <a href=
"http://www.w3.org/2008/WebVideo/Fragments/tracker/actions/190">
http://www.w3.org/2008/WebVideo/Fragments/tracker/actions/190</a></p>
<p class='phone'><a href=
"http://dev.w3.org/html5/spec/video.html#concept-video-intrinsic-width">
http://dev.w3.org/html5/spec/video.html#concept-video-intrinsic-width</a></p>
<p class='phone'>Room trying to understand the issue</p>
<p class='phone'>Room having a laugh reading <a href=
"http://www.emdpi.com/csspixel.html">http://www.emdpi.com/csspixel.html</a></p>
<p class='phone'><cite>Jack:</cite> in section 7, we could put
a note for phrasing this issue. Philip is our HTML5 expert to
do this phrasing</p>
<p class='phone'><cite>Davy:</cite> we should have another
section 7.x for browsers, how they should render media
fragment<br />
... different than 7.1 which is for general clients</p>
<p class='phone'><cite>Jack:</cite> 7.1 should be browsers, 7.2
general clients, 7.3 servers<br />
... + a note for stating that all sub-sections are not mutually
exclusive</p>
<p class='phone'><cite>Raphael:</cite> actually, 7.1 =
browsers, 7.2 general display clients, 7.3 all clients, 7.4
servers</p>
<p class='phone'><cite>Jack:</cite> then in 7.1, we could have
the result of the action 190, the mapping to css pixels<br />
... I would be happy that Philip + Silvia draws a list of all
things that matter to a HTML5 browser rendering client for
media fragments<br />
... perhaps put a warning that the content of this new section
is based on the current state of HTML5 discussion as per ...
<date></p>
<p class='irc'><<cite>silvia</cite>> so, do you want a
description that spatial fragments should be spliced in html5
elements?</p>
<p class='irc'><<cite>foolip</cite>> anyone know when
we're going to have the TPAC calls? I can't find anything
definitive in my mail</p>
<p class='phone'>[back from coffee break]</p>
<p class='phone'>Silvia, I'm not sure I understand your
question</p>
<p class='phone'>Philip, we have started the Media Fragments WG
f2f meeting at TPAC</p>
<p class='phone'><cite>scribe:</cite> agenda is at <a href=
"http://www.w3.org/2008/WebVideo/Fragments/wiki/SeventhF2FAgenda">
http://www.w3.org/2008/WebVideo/Fragments/wiki/SeventhF2FAgenda</a>
(add your topics that you would like to be discussed)</p>
<p class='irc'><<cite>jackjansen</cite>> foolip,
currently not</p>
<p class='irc'><<cite>silvia</cite>> raphael: my question
was about what should be added to a browser section (html
section?) in 7.1</p>
<p class='irc'><<cite>silvia</cite>> I wondered if it was
ok to add spatial fragments as splicing the image</p>
<p class='phone'>Philip, we can setup the call now if you're
ready</p>
<p class='irc'><<cite>foolip</cite>> ok, where are you in
the agenda/</p>
<p class='phone'>Silvia, we are exactly dicussing what should
we add to this new section 7.1</p>
<p class='phone'><cite>scribe:</cite> so far, the pixels
discussion</p>
<p class='phone'><cite>Raphael:</cite> Philip, we wonder
whether you and Silvia could write down a list of items that
(HTML5) browsers need to consider when implementing media
fragments<br />
... but notes that are not applicable to general rendering
clients and already written<br />
... for example, the pixels discussion<br />
... could you phrase the issue of what mapping to CSS pixels
should be done for example?</p>
<p class='phone'>Silvia, by splicing, you mean cropping?</p>
<p class='irc'><<cite>silvia</cite>> yup</p>
<p class='irc'><<cite>foolip</cite>> the issue of aspect
ratio isn't browser-specific, all UAs would have to deal with
the issue. "CSS-pixels" is actually just the size after
applying aspect ratio scaling in one dimension</p>
<p class='phone'>Sylvia, we have a paragraph so far that talk
about either highlighting or cropping</p>
<p class='phone'><cite>scribe:</cite> which one makes more
sense ?</p>
<p class='irc'><<cite>jackjansen</cite>> invite zakim</p>
<p class='phone'>join zakim #mediafrag</p>
<p class='phone'>Silvia, Philip, you can now dial in and we
will see if it works</p>
<p class='phone'><cite>Philip:</cite> this is not a CSS
issue<br />
... the question is when do we have a xywh dimension, does it
apply before of after that there was a aspect ratio
transform</p>
<p class='phone'><cite>Jack:</cite> the original media item is
1080, but the device is 720 width, so which pixels should be
considered when applying a media fragment xywh?</p>
<p class='irc'><<cite>foolip</cite>> <a href=
"http://en.wikipedia.org/wiki/Anamorphic_format">http://en.wikipedia.org/wiki/Anamorphic_format</a></p>
<p class='phone'><cite>Jack:</cite> I think we have trouble to
understand what exactly is the CSS pixel concept and therefore
the issue</p>
<p class='phone'><cite>Philip:</cite> the container format has
tow information, the preferred display size and the real
size</p>
<p class='irc'><<cite>foolip</cite>> For example, WebM
has Pixel width/height and Display width/height. This is the
same as Matroska: <a href=
"http://www.matroska.org/technical/specs/index.html">http://www.matroska.org/technical/specs/index.html</a></p>
<p class='irc'><<cite>foolip</cite>> Actually, Matroska
also has PixelCropBottom, etc</p>
<p class='phone'><cite>Jack:</cite> in QuickTime 7, open a
movie you can choose between normal size and display size</p>
<p class='irc'><<cite>foolip</cite>> The point is that
the physical pixels aren't always the same as the display
size</p>
<p class='phone'>ok Philip, we understand now the issue</p>
<p class='phone'><cite>Philip:</cite> CSS pixels are display
pixels</p>
<p class='irc'><<cite>foolip</cite>> "information
rich"?</p>
<p class='irc'><<cite>silvia</cite>> I would suggest that
there are three levels: 1. what is encoded in the stream, 2.
what the browser receives after decoding, 3. what the browser
displays after scaling etc</p>
<p class='irc'><<cite>foolip</cite>> silvia, isn't 1 and
2 the same?</p>
<p class='irc'><<cite>silvia</cite>> I think we should
attach the pixel count to 2.</p>
<p class='irc'><<cite>silvia</cite>> not really - there
is pixel crop in several formats - ogg does it, too</p>
<p class='irc'><<cite>silvia</cite>> I would suggest not
to count those pixels that are cropped in the format</p>
<p class='irc'><<cite>foolip</cite>> silvia, I would
consider the effect of crop+scaling as one step, but
anyway...</p>
<p class='irc'><<cite>silvia</cite>> a media fragment URI
that is used by itself in the browser address bar has no
scaling applied to the video - it's that display to which I
would attach the cropping</p>
<p class='irc'><<cite>silvia</cite>> (when I said
"cropped in the format", I meant PixelCropBottom and stuff like
that)</p>
<p class='irc'><<cite>foolip</cite>> the scaling I'm
talking about is horizontal OR vertical scaling to get the
correct aspect ratio, not scaling to fit the video in a
webpage</p>
<p class='irc'><<cite>foolip</cite>> so, the dimension I
suggest we use are the same as we see in
HTMLVideoElement.videoWidth and .videoHeight</p>
<p class='irc'><<cite>foolip</cite>> I assume we agree
but don't understand each other :)</p>
<p class='irc'><<cite>silvia</cite>> except that
HTMLVideoElement.videoWidth and .videoHeight have the @height
and @width scaling of the <video> element executed on
it</p>
<p class='irc'><<cite>foolip</cite>> silvia, no, it
doesn't</p>
<p class='irc'><<cite>foolip</cite>> at least not in
Opera or according to the spec</p>
<p class='irc'><<cite>silvia</cite>> ah, ok, then it is
those width and height indeed</p>
<p class='irc'><<cite>foolip</cite>> right :)</p>
<p class='irc'><<cite>silvia</cite>> that's indeed what I
meant with option 2</p>
<p class='phone'><cite>Jack:</cite> my proposal is that when
the container format has multiple interpretations of the width
and height<br />
... then we should fall back to the display width and height
(aka CSS pixels)<br />
... and we could give the example of the Anamorphic format
versus the example of vector graphics</p>
<p class='irc'><<cite>foolip</cite>> <a href=
"http://dev.w3.org/html5/spec/video.html#concept-video-intrinsic-width">
http://dev.w3.org/html5/spec/video.html#concept-video-intrinsic-width</a></p>
<p class='irc'><<cite>silvia</cite>> we could just simply
refer to the HTMLVideoElement.videoWidth and .videoHeight
description</p>
<p class='irc'><<cite>foolip</cite>> I disagree, this is
not a implementor note, we need to say precisely what to do, as
with everything else.</p>
<p class='irc'><<cite>foolip</cite>> No need for new
sections, just say it where we define xywh</p>
<p class='irc'><<cite>silvia</cite>> no, it's bad to
leave such things open for interpretation</p>
<p class='irc'><<cite>silvia</cite>> I cannot think of a
situation where it would be desirable to use a different
meaning</p>
<p class='irc'><<cite>foolip</cite>> sorry, call
dropped</p>
<p class='irc'><<cite>silvia</cite>> at least write it
into the HTML / browser section in this way as a
requirement</p>
<p class='phone'>People in the room tends also to think that it
should be specified when we talk about xywh</p>
<p class='phone'><cite>Jack:</cite> fine</p>
<p class='irc'><<cite>foolip</cite>> I think that in
general we should have as few "implementor notes" as possible,
if we're not sure about how to implement something then that's
a very dangerous thing, IMO</p>
<p class='irc'><<cite>silvia</cite>> I agree</p>
<p class='phone'><cite>Jack:</cite> and if someone in the
future is interested in physical pixels, then they should
invent "xywh-physical" for addressing them</p>
<p class='irc'><<cite>jackjansen</cite>> I agree too.</p>
<p class='phone'>ok, great consensus</p>
<p class='irc'><<cite>jackjansen</cite>> Section 7 is for
"practicality beats purity"</p>
<p class='irc'><<cite>silvia</cite>> why not re-use the
text from the HTML5 spec - or at least link to it?</p>
<p class='phone'><cite>Raphael:</cite> I need someone to edit
the section 4.3.2 to state about which pixels we are talking
about (actually CSS pixels) and refer to HTML5 spec<br />
... no reference to HTML5 spec, sorry<br />
... we cannot because we will be REC before them</p>
<p class='irc'><<cite>silvia</cite>> but we can copy the
text</p>
<p class='phone'>Silvia, or Philip, could you add this sentence
now?</p>
<p class='irc'><<cite>silvia</cite>> sure… give me a
sec</p>
<p class='irc'><<cite>jackjansen</cite>> I don't think we
want that exact text: it had us baffled this morngin</p>
<p class='phone'>phrase it differently, BECAUSE we haven't
udnerstand the HTML5 text in a first place</p>
<p class='phone'><cite>scribe:</cite> so the phrasing was not
good enough</p>
<p class='irc'><<cite>silvia</cite>> oh - what text do
you want then?</p>
<p class='irc'><<cite>silvia</cite>> why don't you add it
then?</p>
<p class='irc'><<cite>foolip</cite>> If there's something
wrong with the phrasing, have it changed in HTML5 first, please
:)</p>
<p class='irc'><<cite>foolip</cite>> just file a bug and
it will happen</p>
<p class='phone'>Philip, you're the one to make changes in the
HTML5 spec :-)</p>
<p class='irc'><<cite>foolip</cite>> or, tell me what's
difficult to understand and I'll make it happen</p>
<p class='phone'>let's edit this sentence in our spec on
irc</p>
<p class='irc'><<cite>silvia</cite>> I really don't see
how it can be formulated better</p>
<p class='phone'>First sentence reads:</p>
<p class='phone'>Spatial clipping selects an area of pixels
from visual media streams. For this release of the media
fragment specification, only rectangular selections are
supported. The rectangle can be specified as pixel coordinates
or percentages.</p>
<p class='irc'><<cite>silvia</cite>> it refers to CSS
pixels and explains what needs to be taken care of</p>
<p class='phone'>I suggest we add afterwards a sentence talking
about CSS pixels</p>
<p class='phone'>Which sentence do you want to re-use
exactly?</p>
<p class='irc'><<cite>silvia</cite>> s/specified as pixel
coordinates or pecentages/specified as CSS pixel coordinates or
percentages/</p>
<p class='irc'><<cite>silvia</cite>> then explain CSS
pixels for video the way that HTML5 does</p>
<p class='phone'>OK silvia, so you want to add this sentence
afterwards?</p>
<p class='irc'><<cite>foolip</cite>> It seems to me
things would be less confusing if we actually used CSS syntax
here, i.e. 10px or 10%. Then it's more obvious that px refers
to the same thing that it would in CSS.</p>
<p class='phone'>"The intrinsic width and intrinsic height of
the media resource are the dimensions of the resource in CSS
pixels after taking into account the resource's dimensions,
aspect ratio, clean aperture, resolution, and so forth, as
defined for the format used by the resource. If an anamorphic
format does not define how to apply the aspect ratio to the
video data's dimensions to obtain the "correct" dimensions,
then the user agent must apply the ratio by increas</p>
<p class='phone'>Philip, currently, our syntax is:
#xywh=160,120,320,240 or #xywh=pixel:160,120,320,240</p>
<p class='irc'><<cite>silvia</cite>> We could write:</p>
<p class='irc'><<cite>foolip</cite>> Yep. Never mind the
syntax for now, that's easy to change later.</p>
<p class='irc'><<cite>silvia</cite>> "CSS pixels are
pixels as calculated after taking into account the resource's
dimensions, aspect ratio, clean aperture, resolution, and so
forth, as defined for the format used by the resource. If an
anamorphic format does not define how to apply the aspect ratio
to the video data's dimensions to obtain the "correct"
dimensions, then the user agent must apply the ratio by
increasing one dimension and leaving the other unchanged."</p>
<p class='phone'>thanks Silvia</p>
<p class='irc'><<cite>foolip</cite>> I'm not joking at
all, but let's focus on the issue at hand.</p>
<p class='phone'>The only issue for Jack is that we should
perhaps not name them "CSS pixels", they have nothing to do
with CSS</p>
<p class='irc'><<cite>silvia</cite>> foolip: does that
sentence sound correct still? it's not quite what html5 says,
but CSS pixels aren't defined there...</p>
<p class='irc'><<cite>silvia</cite>> Jack: in html5 they
are relevant as CSS pixels, because CSS scaling and stuff is
applied to them</p>
<p class='irc'><<cite>silvia</cite>> and we might as well
make that link here</p>
<p class='irc'><<cite>foolip</cite>> Uh, I think copying
the text at all is a pretty bad idea, especially if we don't
link to where it was copied from.</p>
<p class='phone'>Philip, in a recommendation, you should avoid
linking to a WD or any other document which is not a REC</p>
<p class='irc'><<cite>silvia</cite>> we should of course
link to it to also say that we mean the same thing as HTML5</p>
<p class='phone'><cite>scribe:</cite> because of dependency
issue</p>
<p class='irc'><<cite>silvia</cite>> I would make an
exception here</p>
<p class='irc'><<cite>foolip</cite>> I can see why that
general policy exists, but clearly it's harmful in this
instance.</p>
<p class='phone'><cite>scribe:</cite> what's happened if the
HTML5 spec removes this paragraph at REC stage after you have
been rec? You need to publish an erratum<br />
... too dangerous</p>
<p class='irc'><<cite>silvia</cite>> no, there's no
chance that section will be removed</p>
<p class='phone'>Silvia, we can make exceptions for many things
then, and this is simply not acceptable</p>
<p class='phone'><cite>scribe:</cite> you know St Thomas</p>
<p class='irc'><<cite>silvia</cite>> no, I wouldn't make
exceptions for many things - but in this instance I woudl</p>
<p class='phone'>Silvia, perhaps you want to make an exception,
but the director will NOT</p>
<p class='phone'><cite>scribe:</cite> this is the shortcut to
get a veto from the W3C director (and many members by the
way)</p>
<p class='irc'><<cite>silvia</cite>> maybe he would - it
would be harmful not to make an exception here, because we want
to mean the same thing as HTML5</p>
<p class='irc'><<cite>foolip</cite>> So there can't be
any links to documents that aren't in REC?</p>
<p class='phone'>great, we make our own sentence, and that's
fine</p>
<p class='phone'>not in normative part Philip</p>
<p class='phone'>and this is a 20 years old practice</p>
<p class='irc'><<cite>foolip</cite>> OK, so put it in a
note then.</p>
<p class='irc'><<cite>jackjansen</cite>> "If the
underlying media format has multiple interpretations of pixel
dimensions, then MF pixels MUST be interpreted in the display
coordinates"</p>
<p class='phone'><cite>Jack:</cite> "Pixels coordinates are
interpreted after taking into account the resource's
dimensions, aspect ratio, clean aperture, resolution, and so
forth, as defined for the format used by the resource."</p>
<p class='irc'><<cite>silvia</cite>> maybe the note can
say that it means the same as what is defined as intrinsic
width/height on the video in the draft HTML5 spec</p>
<p class='phone'><cite>Philip:</cite> could we add as well " If
an anamorphic format does not define how to apply the aspect
ratio to the video data's dimensions to obtain the "correct"
dimensions, then the user agent must apply the ratio by
increasing one dimension and leaving the other unchanged."
?</p>
<p class='phone'>yes Silvia</p>
<p class='irc'><<cite>foolip</cite>> Note: this is
equivalent to intrinsic width and height in HTML5 <<a href=
"http://dev.w3.org/html5/spec/video.html#concept-video-intrinsic-width%3E">http://dev.w3.org/html5/spec/video.html#concept-video-intrinsic-width></a></p>
<p class='irc'><<cite>jackjansen</cite>> "The pixel
coordinates defined in 4.3.2 are intended to be identical to
the "CSS pixels" defined by HTML5"</p>
<p class='irc'><<cite>foolip</cite>> different
section?</p>
<p class='irc'><<cite>foolip</cite>> not "CSS pixels",
intrinsic width and height</p>
<p class='irc'><<cite>jackjansen</cite>> filip, right</p>
<p class='phone'>close ACTION-190</p>
<p class='irc'><<cite>trackbot</cite>> ACTION-190 Update
our spec to talk about video intrinsic width closed</p>
<p class='phone'>Changes have been made in section 4.3.2:
<a href=
"http://www.w3.org/2008/WebVideo/Fragments/WD-media-fragments-spec/#naming-space">
http://www.w3.org/2008/WebVideo/Fragments/WD-media-fragments-spec/#naming-space</a></p>
<p class='phone'><cite>scribe:</cite> and in section 7.1:
<a href=
"http://www.w3.org/2008/WebVideo/Fragments/WD-media-fragments-spec/#media-fragment-browser">
http://www.w3.org/2008/WebVideo/Fragments/WD-media-fragments-spec/#media-fragment-browser</a></p>
<p class='phone'>anyone UN-happy, please, speak</p>
<p class='irc'><<cite>foolip</cite>> yes</p>
<p class='irc'><<cite>foolip</cite>> I'd rather section
7.1 didn't exist, and the note being put directly after the
copied text in <a href=
"http://www.w3.org/2008/WebVideo/Fragments/WD-media-fragments-spec/#naming-space">
http://www.w3.org/2008/WebVideo/Fragments/WD-media-fragments-spec/#naming-space</a></p>
<p class='irc'><<cite>silvia</cite>> ah, yes, I agree
with Philip actually - seeing as it should be used everywhere
to mean the same thing</p>
<p class='phone'><cite>Raphael:</cite> highlight vs
cropping<br />
... should we say more than the current pararaph ?</p>
<p class='phone'>"For a spatial URI fragment, we foresee two
distinct use cases: highlighting the spatial region in-context
and cropping to the region. In the first case, the spatial
region could be indicated by means of a bounding box or the
background (i.e., all the pixels that are not contained within
the region) could be blurred or darkened. In the second case,
the region alone would be presented as a cropped area. How a
document author specifies which use case is in</p>
<p class='phone'>in particular, should we talk now with
CSS?</p>
<p class='irc'><<cite>foolip</cite>> I think we should
just rename xywh to crop.</p>
<p class='irc'><<cite>foolip</cite>> Annotations don't
care about display anyway.</p>
<p class='phone'><cite>Jack:</cite> for time, we have both,
cropping (query) and highlihting (in context view), why you
would like to make it different for space?</p>
<p class='phone'><cite>Philip:</cite> because there is a good
reason for time, I don't see it for space</p>
<p class='phone'><cite>Jack:</cite> but annotation use case is
about addressing pixels, not cropping or highlighting</p>
<p class='irc'><<cite>silvia</cite>> maybe for the visual
domain it might make sense to have them explicitly different -
then annotation ppl can use xywh and browsers can use crop?
(not sure...)</p>
<p class='irc'><<cite>silvia</cite>> ninsuna does nothing
on the server for regions</p>
<p class='irc'><<cite>silvia</cite>> I haven't seen the
ninsuna client yet, I think...</p>
<p class='phone'>it is on the web silvia</p>
<p class='irc'><<cite>davy</cite>> <a href=
"http://ninsuna.elis.ugent.be/MediaFragmentsPlayer">http://ninsuna.elis.ugent.be/MediaFragmentsPlayer</a></p>
<p class='phone'>we have demoed it everywhere</p>
<p class='irc'><<cite>silvia</cite>> I had only seen the
plugin</p>
<p class='phone'>Silvia, 2 F2F ago, we already showed the Flash
client from Davy, I'm sure you have commented on it, so you
must have seen it :-)</p>
<p class='irc'><<cite>silvia</cite>> so,
xywh=247,156,129,206 already means highlighting to
everyone?</p>
<p class='irc'><<cite>silvia</cite>> so,
crop=247,156,129,206 could mean cropping - would be the easy
way out actually...</p>
<p class='phone'><cite>scribe:</cite> there are slides about it
at the Barcelona F2F meeting, look at our meetings dir in our
web space</p>
<p class='irc'><<cite>jackjansen</cite>> silvia, xywh
doesn't mean highlighting nor cropping. It means addressing,
nothing more.</p>
<p class='irc'><<cite>silvia</cite>> because it ends up
in in-compatible interpretations of the URI</p>
<p class='irc'><<cite>silvia</cite>> when a Web developer
cannot rely on what will be presented in all browsers the same
way, it's in-compatible and under-specified</p>
<p class='phone'>Yes Silvia, but this is not our fault but the
fault of HTML5</p>
<p class='phone'><cite>scribe:</cite> what Jack is saying is
that for us, it should be an implementation note, but for
HTML5, the behavior should be normative<br />
... I guess the issue is that rendering in browsers should be
specified in HTML5 and not in Media Fragments<br />
... media fragments is just about "addressing"</p>
<p class='irc'><<cite>silvia</cite>> we should put it
into the browser section at minimum</p>
<p class='phone'><cite>Philip:</cite> then, if it is the case,
we should remove all the section 7 implementers note, rather
than having half in our spec and half in other documents</p>
<p class='phone'>Yes silvia, this is what Jack proposes</p>
<p class='irc'><<cite>silvia</cite>> and if we want
browsers to support both display mechanisms, we need two
different means of addressing</p>
<p class='irc'><<cite>silvia</cite>> I'm warming to the
thought of "crop"</p>
<p class='phone'>Slvia, you are adapting the display mechanism
to the address while it should be the contrary</p>
<p class='irc'><<cite>silvia</cite>> no, I am saying that
we are under-specifying the mechanism</p>
<p class='irc'><<cite>foolip</cite>> Anyway, can we take
a step back and see what we're actually discussing?</p>
<p class='irc'><<cite>silvia</cite>> html fragments also
always mean the same in all applications</p>
<p class='phone'>if you can "style" what you address, then you
don't need to invent 10 terms for 10 different displays of the
same region addressed, right ?</p>
<p class='irc'><<cite>davy</cite>> CSS descriptors could
be used for displaying media fragments</p>
<p class='irc'><<cite>foolip</cite>> I really doubt we'll
see CSS extensions specifically for xywh, because it'd have to
be very complicated to do things that are simple to do without
it.</p>
<p class='irc'><<cite>silvia</cite>> I'm playing with the
thought and I can only see advantages this far</p>
<p class='phone'>[lunch break]</p>
<p class='irc'><<cite>foolip</cite>> are we starting
again soon?</p>
<p class='phone'><cite>Philip:</cite> there will be no other
people that will specify this except us<br />
... so either we make it in our spec or we make it in the HTML5
spec, but it will be us</p>
<p class='phone'><cite>Raphael:</cite> where the rendering of a
media fragment according to the space dimension should be
specified?</p>
<p class='irc'><<cite>foolip</cite>> <a href=
"http://www.w3.org/Bugs/Public/show_bug.cgi?id=10723">http://www.w3.org/Bugs/Public/show_bug.cgi?id=10723</a></p>
<p class='phone'><cite>Philip:</cite> I don't care what should
happen and where, I care about having this specified somewhere
so that there is no interoperability or different behaviors in
various browsers</p>
<p class='phone'><cite>Jack:</cite> I think we should just have
a non normative text in the Media Fragment spec. We should
rather propose a text to HTML5, and they vote if they want to
include it or not<br />
... yes, cropping seems to be the best default solution for
html browsers<br />
... let's propose a crop only text to HTML5 and see WebApps or
CSS complaint about</p>
<p class='phone'><cite>Philip:</cite> this should not be
something that goes towards mime type registration?<br />
... So shouldn't we write something, a hook, for enabling such
a mime type registration</p>
<p class='irc'><<cite>foolip</cite>> I said that I think
I agree with Ian that this *should* go into MIME type
registrations</p>
<p class='phone'>thanks for the reformulation</p>
<p class='irc'><<cite>foolip</cite>> but, I'm not
sure</p>
<p class='irc'><<cite>foolip</cite>> it would be terrible
if two different MIME types defined things differently</p>
<p class='irc'><<cite>foolip</cite>> In reality, browsers
will just do the same thing for all types...</p>
<p class='irc'><<cite>silvia</cite>> we never really
finished the discussion about how to get uptake by the media
formats on this - IIRC Raphael or Yves had a discussion with
TBL about how that could be done without having to update every
single mime type registration - can somebody clarify where
we're at with that?</p>
<p class='phone'>Yves has further discussed this with TAG and
TimBL last weeks and this morning</p>
<p class='phone'><cite>scribe:</cite> he will update us later
today or tomorrow morning</p>
<p class='phone'>Jack is editing section 7 now, to clarify that
browsers should crop spatial fragments</p>
<p class='irc'><<cite>foolip</cite>> Adding non-normative
text doesn't change anything.</p>
<p class='irc'><<cite>foolip</cite>> There should be
normative text *somewhere*.</p>
<p class='phone'><cite>scribe:</cite> and that other clients
can crop or highlight regions</p>
<p class='phone'>YES, Philip, this is the first part</p>
<p class='irc'><<cite>foolip</cite>> Also, special-casing
browsers is very atypical.</p>
<p class='phone'>the second is to send this text being edited
to HTML5 and see if they want it *normatively*</p>
<p class='phone'>if we do: s / browsers / HTML5 renderers,do
you prefer ?</p>
<p class='irc'><<cite>silvia</cite>> if we are making a
browser section, we might as well make our section
normative</p>
<p class='phone'>why silvia ?</p>
<p class='phone'>this is implementation specific</p>
<p class='irc'><<cite>silvia</cite>> no, every HTML
rendering UA must do the same thing - otherwise it's not much
of a standard, right?</p>
<p class='irc'><<cite>jackjansen</cite>> please read and
review: I tend to be somewhat terse in my prose...</p>
<p class='phone'><cite>Jack:</cite> if we like this, how do we
push this to HTML5 WG?</p>
<p class='irc'><<cite>silvia</cite>> it's not
prescriptive enough for HTML5</p>
<p class='irc'><<cite>foolip</cite>> I don't think it's
fruitful to try to work this out in real time, right now.</p>
<p class='irc'><<cite>silvia</cite>> but I'd be happy to
make a proposal through that bug - it's as simple as adding the
spec text to the bug to start a discussion and get a change</p>
<p class='irc'><<cite>davy</cite>> Is the rendering of
the video timeline a similar issue?</p>
<p class='irc'><<cite>davy</cite>> e.g., <a href=
"http://dev.opera.com/articles/view/custom-html5-video-player-with-css3-and-jquery/">
http://dev.opera.com/articles/view/custom-html5-video-player-with-css3-and-jquery/</a></p>
<p class='irc'><<cite>foolip</cite>> It's similar, people
won't use browser-native highlighting for the same reason they
won't use native controls, because you can't customize how it
looks, and no one is working on any CSS extensions to fix
it.</p>
<p class='phone'><cite>Raphael:</cite> Silvia, I'm proposing to
edit the bug, but feel free to do it<br />
... my plan was to add the paragraph in 7.2 in the bug
entry<br />
... and let HTML5 decides what to put in their spec</p>
<p class='irc'><<cite>silvia</cite>> no, not that way -
it's got to be terse and it has to be addressed at a specific
section in the spec where it should go</p>
<p class='irc'><<cite>silvia</cite>> think about as
though you are the editor of the spec and you are proposing
what text has to go in</p>
<p class='irc'><<cite>silvia</cite>> more like a
patch</p>
<p class='irc'><<cite>foolip</cite>> We shouldn't suggest
any specific text, let's just say what we want and let Ian
figure out the details.</p>
<p class='phone'>What about saying Ian to make the text he
wants from</p>
<p class='phone'>"For a spatial URI fragment, we foresee two
distinct use cases: highlighting the spatial region in-context
and cropping to the region. In the first case, the spatial
region could be indicated by means of a bounding box or the
background (i.e., all the pixels that are not contained within
the region) could be blurred or darkened. In the second case,
the region alone would be presented as a cropped area."</p>
<p class='irc'><<cite>silvia</cite>> really? he'll just
say it doesn't belong there..</p>
<p class='irc'><<cite>foolip</cite>> If he's wrong, then
we should tell him why :)</p>
<p class='irc'><<cite>foolip</cite>> I'm not sure myself,
at this point.</p>
<p class='phone'>Silvia, Ian said it should belong to the mime
type registration (not in HTML5, not in Media Fragment), but it
will NOT appear there</p>
<p class='irc'><<cite>silvia</cite>> that's a second
thing: we need a good answer for why it's not going into mime
type registrations</p>
<p class='phone'><cite>scribe:</cite> and he made it appear in
the HTML5 spec for the HTML fragment spec ... not in a separate
mime type registration document</p>
<p class='phone'>Silvia, do you want to edit the bug?</p>
<p class='phone'><cite>scribe:</cite> so we can move on?</p>
<p class='irc'><<cite>silvia</cite>> at minimum there are
these sections affected:</p>
<p class='irc'><<cite>silvia</cite>> <a href=
"http://www.whatwg.org/specs/web-apps/current-work/multipage/history.html#scroll-to-fragid">
http://www.whatwg.org/specs/web-apps/current-work/multipage/history.html#scroll-to-fragid</a>
and</p>
<p class='irc'><<cite>silvia</cite>> <a href=
"http://www.whatwg.org/specs/web-apps/current-work/multipage/video.html#video">
http://www.whatwg.org/specs/web-apps/current-work/multipage/video.html#video</a></p>
<p class='irc'><<cite>silvia</cite>> (sorry, but I prefer
the whatwg version ;)</p>
<p class='phone'>fine</p>
<p class='irc'><<cite>silvia</cite>> (it's more
up-to-date)</p>
<p class='irc'><<cite>foolip</cite>> and it's green
:)</p>
<p class='irc'><<cite>silvia</cite>> I'll update the bug
after we have an answer to the question about mime type
registrations</p>
<p class='phone'>ok</p>
<p class='phone'><cite>Raphael:</cite> we wait for the debrief
of Yves regarding the discussion in TAG</p>
<p class='irc'><<cite>silvia</cite>> I also added a topic
to our discussion list about what to do for video fragment
addressing when it's about videos on a web page</p>
<p class='phone'>Silvia, I put it in the agenda too</p>
<p class='irc'><<cite>silvia</cite>> I think that may
also be relevant</p>
<p class='phone'><cite>scribe:</cite> and I observe we have
already discussed this several times<br />
... and already come to a conclusion<br />
... but you want to re-open the can of worms :-)</p>
<p class='irc'><<cite>silvia</cite>> for now we can
collect all these things in the "browser" section of "our"
spec</p>
<h3 id="item03">3. Track and Name dimensions</h3>
<p class='irc'><<cite>silvia</cite>> I do because we are
moving closer to real-world use and we have to do more than
initially intended</p>
<p class='phone'><cite>Davy:</cite> Regarding the track
dimensions, it is almost always impossible to write all the
byte ranges<br />
... so we will _always_ perform a redirect<br />
... hence, if a media fragment URI uses a # with the track
dimension<br />
... we redirect to the '?' parameter<br />
... see <a href=
"http://www.w3.org/2008/WebVideo/Fragments/WD-media-fragments-spec/#processing-protocol-UA-mapped-changed">
http://www.w3.org/2008/WebVideo/Fragments/WD-media-fragments-spec/#processing-protocol-UA-mapped-changed</a></p><a name="action03"
id="action03"></a>
<p class='irc'><<cite>scribe</cite>>
<strong>ACTION:</strong> Erik to make a schema for this recipe
[recorded in <a href=
"http://www.w3.org/2010/11/01-mediafrag-minutes.html#action03">http://www.w3.org/2010/11/01-mediafrag-minutes.html#action03</a>]</p>
<p class='irc'><<cite>trackbot</cite>> Created ACTION-193
- Make a schema for this recipe [on Erik Mannens - due
2010-11-08].</p>
<p class='phone'><cite>Raphael:</cite> the section 5 is
organized per recipes<br />
... but it is confusing when one looks at the dimension<br />
... hence, spatial dimension has no dimension (no request is
sent to the server)<br />
... the track dimension is always in the case of
server-redirect recipe<br />
... most likely, the same for name dimension<br />
... therefore, only the time dimension can use all these
recipes<br />
... should we not write this down up in the section 5?</p>
<p class='phone'>s/has no dimension/has no recipe</p>
<p class='phone'><cite>Raphael:</cite> we have 3 types or
recipes<br />
... UA mapped byte ranges ... for the temporal dimension<br />
... Server mapped byte ranges ... mainly for legacy
formats<br />
... Server triggered redirect ... for the track and name
dimensions<br />
... further, for the space dimension, no range request is
issued<br />
... I suggest to add this in the intro of Section 5</p><a name=
"action04" id="action04"></a>
<p class='irc'><<cite>scribe</cite>>
<strong>ACTION:</strong> raphael to add an intro paragraph in
the section 5 to explain which recipes is useful for which
dimension [recorded in <a href=
"http://www.w3.org/2010/11/01-mediafrag-minutes.html#action04">http://www.w3.org/2010/11/01-mediafrag-minutes.html#action04</a>]</p>
<p class='irc'><<cite>trackbot</cite>> Sorry, couldn't
find user - raphael</p><a name="action05" id="action05"></a>
<p class='irc'><<cite>scribe</cite>>
<strong>ACTION:</strong> troncy to add an intro paragraph in
the section 5 to explain which recipes is useful for which
dimension [recorded in <a href=
"http://www.w3.org/2010/11/01-mediafrag-minutes.html#action05">http://www.w3.org/2010/11/01-mediafrag-minutes.html#action05</a>]</p>
<p class='irc'><<cite>trackbot</cite>> Created ACTION-194
- Add an intro paragraph in the section 5 to explain which
recipes is useful for which dimension [on Raphaël Troncy - due
2010-11-08].</p>
<p class='phone'>[coffee break]</p>
<p class='irc'><<cite>foolip</cite>> let me know when you
start again</p>
<p class='phone'>[back from Coffee break]</p>
<p class='phone'><cite>Raphael:</cite> useful coffee break</p>
<p class='irc'><<cite>foolip</cite>> Should I call
in?</p>
<p class='irc'><<cite>foolip</cite>> What's next?</p>
<p class='phone'><cite>Raphael:</cite> Regarding CSS styling of
media fragment in the spatial dimension for rendering, CSS
co-chair Daniel Glazman suggested me to write our text to their
mailing list for improivement</p>
<p class='phone'>s/improivement/improvement</p>
<p class='phone'><cite>Raphael:</cite> further, after talking
with other browser vendors, I will ask feedback from Chris
Double (Mozilla), Eric Carlson (Apple) and Frank Olivier
(Microsoft)<br />
... that all deal with the video elements in their browsers</p>
<p class='irc'><<cite>foolip</cite>> And what about
Chrome developers?</p>
<p class='irc'><<cite>foolip</cite>> will search mail</p>
<p class='phone'><cite>Raphael:</cite> I would like we discuss
about the name dimension</p>
<p class='phone'><cite>Davy:</cite> we see the name dimension
as more general that what media containers could do<br />
... but we have no implementation yet</p>
<p class='phone'><cite>Philip:</cite> name dimension is really
dependent on container formats<br />
... we have chapter names in WebM (mkv)<br />
... we have cue points in MP4</p>
<p class='irc'><<cite>foolip</cite>> Sorry, I can't find
the Chrome developer's name...</p>
<p class='phone'>I will try to find out with corridor
discussion this week</p>
<p class='phone'><cite>Jack:</cite> perhaps this is tightly
correlated to the extensibility discussion we have to do</p>
<p class='phone'>Jack asked frankly, if anyone feels bad in
removing "id" dimension from the spec?</p>
<p class='phone'><cite>Philip:</cite> no strong opinion about
it, if not implemented, it should be out of the spec as a
general principle</p>
<p class='phone'><cite>Raphael:</cite> I like to have this
feature in, but I'm aware we need implementation for this</p>
<p class='phone'><cite>Davy:</cite> our plan is to not rely on
the container format but on media annotations</p>
<p class='irc'><<cite>foolip</cite>> Will we have time to
discuss ISSUE-19 today? If not, I'll be heading home.</p>
<p class='phone'>ISSUE-19?</p>
<p class='irc'><<cite>trackbot</cite>> ISSUE-19 --
Parsing must be defined normatively in the MF spec itself --
open</p>
<p class='irc'><<cite>trackbot</cite>> <a href=
"http://www.w3.org/2008/WebVideo/Fragments/tracker/issues/19">http://www.w3.org/2008/WebVideo/Fragments/tracker/issues/19</a></p>
<p class='irc'><<cite>foolip</cite>> <video
src="video.webm#t=10"></p>
<p class='irc'><<cite>davy</cite>> media fragment
identifiers are only meaningful for media resources, not for
HTML documents</p>
<p class='irc'><<cite>davy</cite>> if sites like YouTube
want to give a meaning to #t=10 applied to an HTML document
containing a video, then it is the responsibility of these
sites to make sure that the media fragment identifier applied
to the HTML document is appended to the media resource URI</p>
<p class='irc'><<cite>davy</cite>> The media fragments
spec will say nothing about the meaning of ....html#t=10,20</p>
<p class='phone'><cite>Raphael:</cite> but a range request will
still be issued from the browser<br />
... if the hash is used on the address bar of the browser<br />
... in all cases</p><a name="action06" id="action06"></a>
<p class='irc'><<cite>scribe</cite>>
<strong>ACTION:</strong> davy to add a paragraph in the section
7.1 to specify that video, audio, img or any href is all
treated similarly (range request issued when facing a media
fragment) [recorded in <a href=
"http://www.w3.org/2010/11/01-mediafrag-minutes.html#action06">http://www.w3.org/2010/11/01-mediafrag-minutes.html#action06</a>]</p>
<p class='irc'><<cite>trackbot</cite>> Created ACTION-195
- Add a paragraph in the section 7.1 to specify that video,
audio, img or any href is all treated similarly (range request
issued when facing a media fragment) [on Davy Van Deursen - due
2010-11-08].</p>
<h3 id="item04">4. Summary</h3>
<p class='phone'><cite>Raphael:</cite> tomorrow will be
about<br />
... 1/ TAG debrief from Yves<br />
... 2/ Extensibility issue with everyone<br />
... 3/ Test Cases presentation from Davy<br />
... 30 min + 2 hours + 1 hour</p>
<p class='phone'>[meeting adjourned]</p>
</div>
<h2><a name="ActionSummary" id="ActionSummary">Summary of Action
Items</a></h2><!-- Action Items -->
<strong>[NEW]</strong> <strong>ACTION:</strong> davy to add a
paragraph in the section 7.1 to specify that video, audio, img or
any href is all treated similarly (range request issued when
facing a media fragment) [recorded in <a href=
"http://www.w3.org/2010/11/01-mediafrag-minutes.html#action06">http://www.w3.org/2010/11/01-mediafrag-minutes.html#action06</a>]<br />
<strong>[NEW]</strong> <strong>ACTION:</strong> Davy to update
the specification to state what the processing should do when
media fragments request (time dimension) does not match exactly
how the media item has been encoded [recorded in <a href=
"http://www.w3.org/2010/11/01-mediafrag-minutes.html#action02">http://www.w3.org/2010/11/01-mediafrag-minutes.html#action02</a>]<br />
<strong>[NEW]</strong> <strong>ACTION:</strong> Erik to make a
schema for this recipe [recorded in <a href=
"http://www.w3.org/2010/11/01-mediafrag-minutes.html#action03">http://www.w3.org/2010/11/01-mediafrag-minutes.html#action03</a>]<br />
<strong>[NEW]</strong> <strong>ACTION:</strong> raphael to add an
intro paragraph in the section 5 to explain which recipes is
useful for which dimension [recorded in <a href=
"http://www.w3.org/2010/11/01-mediafrag-minutes.html#action04">http://www.w3.org/2010/11/01-mediafrag-minutes.html#action04</a>]<br />
<strong>[NEW]</strong> <strong>ACTION:</strong> troncy to add an
intro paragraph in the section 5 to explain which recipes is
useful for which dimension [recorded in <a href=
"http://www.w3.org/2010/11/01-mediafrag-minutes.html#action05">http://www.w3.org/2010/11/01-mediafrag-minutes.html#action05</a>]<br />
<strong>[NEW]</strong> <strong>ACTION:</strong> Yves to update
the production rules of the time dimension with the npt format
for making the hours optional [recorded in <a href=
"http://www.w3.org/2010/11/01-mediafrag-minutes.html#action01">http://www.w3.org/2010/11/01-mediafrag-minutes.html#action01</a>]<br />
<br />
[End of minutes]<br />
<hr />
<address>
Minutes formatted by David Booth's <a href=
"http://dev.w3.org/cvsweb/~checkout~/2002/scribe/scribedoc.htm">
scribe.perl</a> version 1.135 (<a href=
"http://dev.w3.org/cvsweb/2002/scribe/">CVS log</a>)<br />
$Date: 2010/11/01 16:31:26 $
</address>
<div class="diagnostics">
<hr />
<h2>Scribe.perl diagnostic output</h2>[Delete this section
before finalizing the minutes.]<br />
<pre>
This is scribe.perl Revision: 1.135 of Date: 2009/03/02 03:52:20
Check for newer version at <a href=
"http://dev.w3.org/cvsweb/~checkout~/2002/scribe/">http://dev.w3.org/cvsweb/~checkout~/2002/scribe/</a>
Guessing input format: RRSAgent_Text_Format (score 1.00)
Succeeded: s/Idetaca/Idetaka/
Succeeded: s/Idetaka/Hidetaka/
Succeeded: s/Frank/Franck/
Succeeded: s/Nob (NRC ac rep)/Nobu (NEC ac rep)/
Succeeded: s/Toshipa/Toshiba/
Succeeded: s/back in smpte-25/back in smpte-30-drop/
Succeeded: s/if should be normative/it should be normative/
Succeeded: s/other/all/
Succeeded: s/udnerstand/understand/
FAILED: s/specified as pixel coordinates or pecentages/specified as CSS pixel coordinates or percentages/
Succeeded: s/dimension/coordinates/
Succeeded: s/normative/non normative/
Succeeded: s/HTML media fragment/HTML fragment/
FAILED: s/has no dimension/has no recipe/
FAILED: s/improivement/improvement/
Found Scribe: raphael
Inferring ScribeNick: raphael
Found ScribeNick: raphael
WARNING: Replacing list of attendees.
Old list: Roseraie_1 foolip silvia
New list: Roseraie_1 Philip
WARNING: Replacing list of attendees.
Old list: Roseraie_1 Philip
New list: Roseraie_1
Default Present: Roseraie_1
Present: Roseraie_1
WARNING: Fewer than 3 people found for Present list!
Regrets: Erik
Found Date: 01 Nov 2010
Guessing minutes URL: <a href=
"http://www.w3.org/2010/11/01-mediafrag-minutes.html">http://www.w3.org/2010/11/01-mediafrag-minutes.html</a>
People with action items: davy erik raphael troncy yves
</pre>[End of <a href=
"http://dev.w3.org/cvsweb/~checkout~/2002/scribe/scribedoc.htm">
scribe.perl</a> diagnostic output]
</div>
</body>
</html>